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    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>示例9</title>
    <script>
       // 遍历对象的属性 
 const obj = { name: 'John', age: 30, gender: 'male' }; 
 // 下面三个方法的结果可以使用 for...in 遍历 
 console.log(Object.keys(obj)); // ['name', 'age', 'gender'] 
 console.log(Object.values(obj)); // ['John', 30, 'male'] 
 // [['name', 'John'], ['age', 30], ['gender', 'male']] 
 console.log(Object.entries(obj)); 
    </script>
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<body></body>

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